All other things being equal, current will be larger in a wire that has a larger value of All other things being equal, current will be larg

Question

All other things being equal, current will be larger in a wire that has a larger value of All other things being equal, current will be larger in a wire that has a larger value of:______

a. conductivity.
b. resistivity.
c. the coefficient of current net charge.
d. potential.

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Thiên Di 5 months 2021-09-05T16:13:41+00:00 1 Answers 12 views 0

Answers ( )

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    2021-09-05T16:15:08+00:00

    Answer:

    a) conductivity

    Explanation:

    • Assuming the wire obeys Ohm’s Law, for a given voltage, in order to have a larger current, the resistance must be lower.
    • The resistance of a resistive element is given by the following equation:

            R = \rho * \frac{L}{A}

    • If geometric parameters keep the same, the only choice to lower the resistance value is diminishing the resistivity ρ.
    • The resistivity, indeed, is defined as the inverse of the conductivity, σ.
    • So, if resistivity decreases, conductivity increases.
    • So, in order to have a larger current, all other things being equal, the wire must have a larger value of conductivity.
    • The option a) is the right one.

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